quad-sample.c revision 3464ebd5 
1/* Display a cleared blue window.  This demo has no dependencies on
2 * any utility code, just the graw interface and gallium.
3 */
4
5#include "state_tracker/graw.h"
6#include "pipe/p_screen.h"
7#include "pipe/p_context.h"
8#include "pipe/p_shader_tokens.h"
9#include "pipe/p_state.h"
10#include "pipe/p_defines.h"
11
12#include "util/u_debug.h"       /* debug_dump_surface_bmp() */
13#include "util/u_inlines.h"
14#include "util/u_memory.h"      /* Offset() */
15#include "util/u_draw_quad.h"
16#include "util/u_box.h"
17
18#include <stdio.h>
19
20enum pipe_format formats[] = {
21   PIPE_FORMAT_R8G8B8A8_UNORM,
22   PIPE_FORMAT_B8G8R8A8_UNORM,
23   PIPE_FORMAT_NONE
24};
25
26static const int WIDTH = 300;
27static const int HEIGHT = 300;
28
29static struct pipe_screen *screen = NULL;
30static struct pipe_context *ctx = NULL;
31static struct pipe_resource *rttex = NULL;
32static struct pipe_resource *samptex = NULL;
33static struct pipe_surface *surf = NULL;
34static struct pipe_sampler_view *sv = NULL;
35static void *sampler = NULL;
36static void *window = NULL;
37
38struct vertex {
39   float position[4];
40   float color[4];
41};
42
43static struct vertex vertices[] =
44{
45   { { 0.9, -0.9, 0.0, 1.0 },
46     { 1, 0, 0, 1 } },
47
48   { { 0.9,  0.9, 0.0, 1.0 },
49     { 1, 1, 0, 1 } },
50
51   { {-0.9,  0.9, 0.0, 1.0 },
52     { 0, 1, 0, 1 } },
53
54   { {-0.9,  -0.9, 0.0, 1.0 },
55     { 0, 0, 0, 1 } },
56};
57
58
59
60
61static void set_viewport( float x, float y,
62                          float width, float height,
63                          float near, float far)
64{
65   float z = far;
66   float half_width = (float)width / 2.0f;
67   float half_height = (float)height / 2.0f;
68   float half_depth = ((float)far - (float)near) / 2.0f;
69   struct pipe_viewport_state vp;
70
71   vp.scale[0] = half_width;
72   vp.scale[1] = half_height;
73   vp.scale[2] = half_depth;
74   vp.scale[3] = 1.0f;
75
76   vp.translate[0] = half_width + x;
77   vp.translate[1] = half_height + y;
78   vp.translate[2] = half_depth + z;
79   vp.translate[3] = 0.0f;
80
81   ctx->set_viewport_state( ctx, &vp );
82}
83
84static void set_vertices( void )
85{
86   struct pipe_vertex_element ve[2];
87   struct pipe_vertex_buffer vbuf;
88   void *handle;
89
90   memset(ve, 0, sizeof ve);
91
92   ve[0].src_offset = Offset(struct vertex, position);
93   ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
94   ve[1].src_offset = Offset(struct vertex, color);
95   ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
96
97   handle = ctx->create_vertex_elements_state(ctx, 2, ve);
98   ctx->bind_vertex_elements_state(ctx, handle);
99
100
101   vbuf.stride = sizeof( struct vertex );
102   vbuf.buffer_offset = 0;
103   vbuf.buffer = screen->user_buffer_create(screen,
104                                            vertices,
105                                            sizeof(vertices),
106                                            PIPE_BIND_VERTEX_BUFFER);
107
108   ctx->set_vertex_buffers(ctx, 1, &vbuf);
109}
110
111static void set_vertex_shader( void )
112{
113   void *handle;
114   const char *text =
115      "VERT\n"
116      "DCL IN[0]\n"
117      "DCL IN[1]\n"
118      "DCL OUT[0], POSITION\n"
119      "DCL OUT[1], GENERIC[0]\n"
120      "  0: MOV OUT[1], IN[1]\n"
121      "  1: MOV OUT[0], IN[0]\n"
122      "  2: END\n";
123
124   handle = graw_parse_vertex_shader(ctx, text);
125   ctx->bind_vs_state(ctx, handle);
126}
127
128static void set_fragment_shader( void )
129{
130   void *handle;
131   const char *text =
132      "FRAG\n"
133      "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
134      "DCL OUT[0], COLOR\n"
135      "DCL TEMP[0]\n"
136      "DCL SAMP[0]\n"
137      "DCL RES[0], 2D, FLOAT\n"
138      "  0: SAMPLE TEMP[0], IN[0], RES[0], SAMP[0]\n"
139      "  1: MOV OUT[0], TEMP[0]\n"
140      "  2: END\n";
141
142   handle = graw_parse_fragment_shader(ctx, text);
143   ctx->bind_fs_state(ctx, handle);
144}
145
146
147static void draw( void )
148{
149   float clear_color[4] = {.5,.5,.5,1};
150
151   ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
152   util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);
153   ctx->flush(ctx, NULL);
154
155   graw_save_surface_to_file(ctx, surf, NULL);
156
157   screen->flush_frontbuffer(screen, rttex, 0, 0, window);
158}
159
160#define SIZE 16
161
162static void init_tex( void )
163{
164   struct pipe_sampler_view sv_template;
165   struct pipe_sampler_state sampler_desc;
166   struct pipe_resource templat;
167   struct pipe_box box;
168   ubyte tex2d[SIZE][SIZE][4];
169   int s, t;
170
171#if (SIZE != 2)
172   for (s = 0; s < SIZE; s++) {
173      for (t = 0; t < SIZE; t++) {
174         if (0) {
175            int x = (s ^ t) & 1;
176	    tex2d[t][s][0] = (x) ? 0 : 63;
177	    tex2d[t][s][1] = (x) ? 0 : 128;
178	    tex2d[t][s][2] = 0;
179	    tex2d[t][s][3] = 0xff;
180         }
181         else {
182            int x = ((s ^ t) >> 2) & 1;
183	    tex2d[t][s][0] = s*255/(SIZE-1);
184	    tex2d[t][s][1] = t*255/(SIZE-1);
185	    tex2d[t][s][2] = (x) ? 0 : 128;
186	    tex2d[t][s][3] = 0xff;
187         }
188      }
189   }
190#else
191   tex2d[0][0][0] = 0;
192   tex2d[0][0][1] = 255;
193   tex2d[0][0][2] = 255;
194   tex2d[0][0][3] = 0;
195
196   tex2d[0][1][0] = 0;
197   tex2d[0][1][1] = 0;
198   tex2d[0][1][2] = 255;
199   tex2d[0][1][3] = 255;
200
201   tex2d[1][0][0] = 255;
202   tex2d[1][0][1] = 255;
203   tex2d[1][0][2] = 0;
204   tex2d[1][0][3] = 255;
205
206   tex2d[1][1][0] = 255;
207   tex2d[1][1][1] = 0;
208   tex2d[1][1][2] = 0;
209   tex2d[1][1][3] = 255;
210#endif
211
212   templat.target = PIPE_TEXTURE_2D;
213   templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
214   templat.width0 = SIZE;
215   templat.height0 = SIZE;
216   templat.depth0 = 1;
217   templat.last_level = 0;
218   templat.nr_samples = 1;
219   templat.bind = PIPE_BIND_SAMPLER_VIEW;
220
221
222   samptex = screen->resource_create(screen,
223                                 &templat);
224   if (samptex == NULL)
225      exit(4);
226
227   u_box_2d(0,0,SIZE,SIZE, &box);
228
229   ctx->transfer_inline_write(ctx,
230                              samptex,
231                              0,
232                              PIPE_TRANSFER_WRITE,
233                              &box,
234                              tex2d,
235                              sizeof tex2d[0],
236                              sizeof tex2d);
237
238   /* Possibly read back & compare against original data:
239    */
240   if (0)
241   {
242      struct pipe_transfer *t;
243      uint32_t *ptr;
244      t = pipe_get_transfer(ctx, samptex,
245                            0, 0, /* level, layer */
246                            PIPE_TRANSFER_READ,
247                            0, 0, SIZE, SIZE); /* x, y, width, height */
248
249      ptr = ctx->transfer_map(ctx, t);
250
251      if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
252         assert(0);
253         exit(9);
254      }
255
256      ctx->transfer_unmap(ctx, t);
257
258      ctx->transfer_destroy(ctx, t);
259   }
260
261   memset(&sv_template, 0, sizeof sv_template);
262   sv_template.format = samptex->format;
263   sv_template.texture = samptex;
264   sv_template.swizzle_r = 0;
265   sv_template.swizzle_g = 1;
266   sv_template.swizzle_b = 2;
267   sv_template.swizzle_a = 3;
268   sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
269   if (sv == NULL)
270      exit(5);
271
272   ctx->set_fragment_sampler_views(ctx, 1, &sv);
273
274
275   memset(&sampler_desc, 0, sizeof sampler_desc);
276   sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
277   sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
278   sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
279   sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
280   sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
281   sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
282   sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
283   sampler_desc.compare_func = 0;
284   sampler_desc.normalized_coords = 1;
285   sampler_desc.max_anisotropy = 0;
286
287   sampler = ctx->create_sampler_state(ctx, &sampler_desc);
288   if (sampler == NULL)
289      exit(6);
290
291   ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
292
293}
294
295static void init( void )
296{
297   struct pipe_framebuffer_state fb;
298   struct pipe_resource templat;
299   struct pipe_surface surf_tmpl;
300   int i;
301
302   /* It's hard to say whether window or screen should be created
303    * first.  Different environments would prefer one or the other.
304    *
305    * Also, no easy way of querying supported formats if the screen
306    * cannot be created first.
307    */
308   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
309      screen = graw_create_window_and_screen(0, 0, 300, 300,
310                                             formats[i],
311                                             &window);
312      if (window && screen)
313         break;
314   }
315   if (!screen || !window) {
316      fprintf(stderr, "Unable to create window\n");
317      exit(1);
318   }
319
320   ctx = screen->context_create(screen, NULL);
321   if (ctx == NULL)
322      exit(3);
323
324   templat.target = PIPE_TEXTURE_2D;
325   templat.format = formats[i];
326   templat.width0 = WIDTH;
327   templat.height0 = HEIGHT;
328   templat.depth0 = 1;
329   templat.array_size = 1;
330   templat.last_level = 0;
331   templat.nr_samples = 1;
332   templat.bind = (PIPE_BIND_RENDER_TARGET |
333                   PIPE_BIND_DISPLAY_TARGET);
334
335   rttex = screen->resource_create(screen,
336                                 &templat);
337   if (rttex == NULL)
338      exit(4);
339
340   surf_tmpl.format = templat.format;
341   surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
342   surf_tmpl.u.tex.level = 0;
343   surf_tmpl.u.tex.first_layer = 0;
344   surf_tmpl.u.tex.last_layer = 0;
345   surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
346   if (surf == NULL)
347      exit(5);
348
349   memset(&fb, 0, sizeof fb);
350   fb.nr_cbufs = 1;
351   fb.width = WIDTH;
352   fb.height = HEIGHT;
353   fb.cbufs[0] = surf;
354
355   ctx->set_framebuffer_state(ctx, &fb);
356
357   {
358      struct pipe_blend_state blend;
359      void *handle;
360      memset(&blend, 0, sizeof blend);
361      blend.rt[0].colormask = PIPE_MASK_RGBA;
362      handle = ctx->create_blend_state(ctx, &blend);
363      ctx->bind_blend_state(ctx, handle);
364   }
365
366   {
367      struct pipe_depth_stencil_alpha_state depthstencil;
368      void *handle;
369      memset(&depthstencil, 0, sizeof depthstencil);
370      handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
371      ctx->bind_depth_stencil_alpha_state(ctx, handle);
372   }
373
374   {
375      struct pipe_rasterizer_state rasterizer;
376      void *handle;
377      memset(&rasterizer, 0, sizeof rasterizer);
378      rasterizer.cull_face = PIPE_FACE_NONE;
379      rasterizer.gl_rasterization_rules = 1;
380      handle = ctx->create_rasterizer_state(ctx, &rasterizer);
381      ctx->bind_rasterizer_state(ctx, handle);
382   }
383
384   set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
385
386   init_tex();
387
388   set_vertices();
389   set_vertex_shader();
390   set_fragment_shader();
391}
392
393static void args(int argc, char *argv[])
394{
395   int i;
396
397   for (i = 1; i < argc;) {
398      if (graw_parse_args(&i, argc, argv)) {
399         continue;
400      }
401      exit(1);
402   }
403}
404
405
406int main( int argc, char *argv[] )
407{
408   args(argc, argv);
409   init();
410
411   graw_set_display_func( draw );
412   graw_main_loop();
413   return 0;
414}
415